Pythagorean Theorem Distance between Two Points due TODAY i need help i kinda forgot how to do it!!

Karianne and lucius are analyzing a linear function on a graph. karianne says that unit rate is equal to rate of change, but that slope is calculated differently. lucius says that unit rate, rate of change, and slope are calculated the same way. who is correct? explain your answer.

Can any one me with the answers to these questions asap?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?